Table 2. Arterial blood gas parameters.

Time (mins)	Group	Mean Airway Pressure	Tidal Volume	Respiratory Rate	PaO2	PaCO2	SaO2	AaO2
5	Oxytocin	19.8 ± 1.3	5.6 ± 0.8	58.3 ± 0.3	19.5 ± 3.4	62.4 ± 5.9	56.9 ± 6.4	258 ± 57
	RU486	16.4 ± 0.9	6.9 ± 0.3	61.4 ± 2.9	32.4 ± 9.2	63.1 ± 3.8	63.8 ± 10.7	258 ± 41
	Control	17.3 ± 2.4	5.2 ± 0.3	59.4 ± 1.2	20.7 ± 3.4	64.2 ± 6.1	51.3 ± 9.7	463 ± 44
10	Oxytocin	19.3 ± 1.3	6.4 ± 0.6	58.3 ± 0.3	32.8 ± 4.1	53.5 ± 6.1	79.6 ± 5.7	237 ± 53
	RU486	15 ± 0.7	6.8 ± 0.3	57.0 ± 1.1	39.7 ± 6.8	52 ± 5.2	88.8 ± 3.6	308 ± 49
	Control	14.9 ± 0.7	5.6 ± 0.4	59.4 ± 1.3	32.3 ± 5.3	68.5 ± 9.9	82.5 ± 5.2	356 ± 56
20	Oxytocin	19.5 ± 1.0	6.6 ± 0.7	58.3 ± 0.3	34.1 ± 5.5	52.31 ± 5.7	78.7 ± 6.7	272 ± 51
	RU486	15.4 ± 1.3	6.7 ± 0.4	59.8 ± 3.9	40.4 ± 4.4	51.4 ± 5.7	91.7 ± 2.6	325 ± 62
	Control	16.6 ± 2.3	5.6 ± 0.3	61.7 ± 0.8	40.6 ± 3.4	65.5 ± 6.0	86.9 ± 1.3	489 ± 46
30	Oxytocin	18.5 ± 1.3	6.8 ± 0.8	58.3 ± 0.3	30.2 ± 2.2	48.0 ± 8.9	80.5 ± 3.8	313 ± 41
	RU486	14.8 ± 1.2	7.1 ± 0.3	64.6 ± 3.9	34.7 ± 3.3	52.3 ± 4.9	84.2 ± 2.6	258 ± 37
	Control	17.0 ± 2.2	5.7 ± 0.3	61.0 ± 1.1	44.6 ± 5.4	67.2 ± 7.0	87.5 ± 3.0	494 ± 56